The Forma Full Face Mask provides even more comfort with updated features like the FlexiFoam cushion for support and the Under-Chin design that enhances sleep performance. The full face cushion fits under the chin and comes with a highly contoured silicone seal for maximum comfort and stability. The T-Piece forehead support provides added stability and auto adjusts for hassle-free fitting.The inner foam cushion helps contour the mask to the face and promotes optimal frame alignment.